Abstract:

One of the key points of satellite interference source positioning is the location parameters measurement. The existing time delay estimation algorithm of positioning cannot satisfy the time difference of arrival(TDOA) parameter estimation under low signal-to-noise ratio (SNR) circumstance. In order to improve the performance of locating, the least mean square algorithm based on fourth-order cumulant(CUM-LMS) is presented. On the basis of the time delay estimation using forth-order cumulant, the method can extract peak values, measure the LMS and finally get more accurate TDOA parameters. Experiment results show that the presented algorithm effectively improves the performance of time delay estimation.